Perhaps you should try some spelling variations:
2c reliability » 2 reliability, 24 reliability, 20 reliability
ic reliability » 2 reliability, 5 reliability, 9 reliability
22 safety » 2 safety, _ safety, a safety
12 safety » 2 safety, 11 safety, 1 safety
10 safety » _ safety, a safety, 4 safety
5 safety » _ safety, a safety

Try widening your search to All Fields.

You may be able to get more results by adjusting your search query.

• If you are trying to use Boolean operators, they must be ALL CAPS: %quality control%((2c reliability) OR (ic reliability))%((22 safety) OR (((12 safety) OR (((10 safety) OR (5 safety)))))) AND risk%22.
• The words AND, OR and NOT may confuse the search; try adding quotes: "%quality control%((2c reliability) or (ic reliability))%((22 safety) or (((12 safety) or (((10 safety) OR (5 safety)))))) and risk%22".
• Adding a wildcard symbol may retrieve word variants: %quality control%((2c reliability) or (ic reliability))%((22 safety) or (((12 safety) or (((10 safety) OR (5 safety)))))) and risk%22*.